Axle-yoke



UNITED STATES PATENT @rrrca.

HENRY K. PORTER, OF BOSTON, MASSACHUSETTS.

AXLE-YOKE.

SPECIFICATION forming part of Letters Patent No. 297,160, dated April22, 188%.

Application filed July 21, 1883.

To all whom it may concern.-

Be it known that I, HENRY K. PORTER, of Boston, in the county of Suffolkand State of Massachusetts, have invented a new and useful Improvementin Axle-Yokes, which will, in connection with the accompanying drawings,be hereinafter fully described, and specifically defined in the appendedclaims.

This invention relates to the yokes which are placed beneathcarriageaxles, and which receive the rounded ends of the' clips, whichsecure the axle and its wooden stock together, the yoke and clip beingsecured together by nuts, which are threaded upon the ends of the clipand bear against the under side of the yoke.

In the accompanying drawings, Figure 1 is a top or plan view of myimproved yoke. Fig. 2 is a side elevation of my yoke, and showing theiron axle in transverse section as seated in the yoke. Fig. 3 is aperspective view of my yoke. Fig. 4 is a longitudinal vertical sectiontaken on line 2 2, Fig. 1. Fig. 5 is a transverse section taken on lineno, Fig. 1.

In said drawings, a is the yoke, and b is the axle, the latter beingshown as with rounded lower corners. The yoke is formed with the usualclip-holes, d, and with the upper line, 0, between holes (I of suchconcave outline as to fit the lowerpart of axle b, as shown in Fig. 2.From the highest part of the yoke, at h, it is diminished toward end gbya downwardly-curving concave line, f, to a point slightly outside ofhole d, where it intersects with the oblique finish or surface t, whichdivides said curved line f from the line of end g. In the upper side ofthe clip, and between holes d, I cut a central groove, 6, leaving a rib,j, upon each side, as shown; and beneath the yoke I remove a centralportion at It, so

as to leave slightly projecting the nut-seats Z,

as shown.

I am aware that axle-yokes have been heretofore formed to fit therounded lower side of axles, and I do not claim a yoke so formed (N0model.)

or shoulders coincident with the vertical sides of the axle, said topline of the end portion of the yoke and the vertical lines or shouldersforming a right angle or vertex, while my yoke is diminished inthickness from point h outward by a curved'line, f, terminating outsideof holes d, which leaves the yoke much stronger than if a right anglewere formed by the intersection of the top line and a vertical line, asdescribed. Besides, such retiring angle served as a receptacle for dirt,which was difcult to dislodge.

I am also aware that axle-yokes have been formed with a recess in theunder side, which greatly weakens them, as the force exerted by theclip-nuts results in a tensile strain upon the under side of the yoke,and hence the same should be continuous across its full width; but asthe strain exerted by the clip-nuts upon the upper side of the yoke is acompressive .strain, the ribs j are ample to resist the same;

and as the removal of the metal, which would otherwise occupy groove 0,tends largely to improve the quality of the casting, as the yoke is inpractical effect thereby rendered tubular, therefore the groove 6 willnot impair the strength of the yoke while reducing its weight, and itsarrangement between holes (1 is such that it does not in any degreedisfigure the yoke. By forming the raised nut-seats Z upon the undersides of the yoke of the size of the nuts on the'clips, such nuts can atany time be unscrewed for purpose of repairs without marring andremoving the paint beyond the seat which they occupy, as would be thecase if the corners of the nuts, when in a diagonal position, restedupon the usual level surface of the yoke.

I do not claim in this application the configuration imparted to theyoke by means of the peculiar outline of the area shown at i, by whichthe ends of the plane of the sides or edges of the yoke are bounded by acompound curve or cyma recta, while the form of outline of thecorresponding portion of the upper plane of the yoke. is a double cymarecta, whose apex is at the longitudinal center of the yoke, and theupper line of end 9 is an are or curve the ends of which terminate atthe lower corners of the yoke, the same constituting a cave line or fzce adapted to receive and fit to 10 design, for which I have alreadyapplied for the rounded portion of the axle, the upper Letters Patent.face of that part of the yoke which extends I claim as my invention- Ibeyond the axle formed with a descending con- 5 1. An axle yoke having alongitudinal caveline, substantially as specified.

groove formed in the upper side thereof, he- HENRY K. PORTER. tween theclip-receiving holes, substantially \Vitnesses: as specified. T. W.PORTER,

2. In axle-yokes formed with an upper con- EUGENE HUMPHREY.

